7x+12=12x-18=9x-77

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Solution for 7x+12=12x-18=9x-77 equation: 



7x+12=12x-18=9x-77

We move all terms to the left:

7x+12-(12x-18)=0

We get rid of parentheses

7x-12x+18+12=0

We add all the numbers together, and all the variables

-5x+30=0

We move all terms containing x to the left, all other terms to the right

-5x=-30

x=-30/-5

x=+6

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